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Sr-O-C Diagenesis, Strontium, oxygen and carbon isotope analyses of authigenic cement.
The Sr-O-C isotope composition of authigenic carbonate cements provides information on reservoir and basin fluid composition at the time the cement formed:
• 87Sr/86Sr isotope ratios of carbonate cements reflect the 87Sr/86Sr ratios of the precipitating fluid. Combined with SrRSA and seawater Sr data, the Sr isotopes in cement can provide a relative timing of diagenesis.
• Oxygen isotope data can constrain precipitation temperature or water oxygen isotope composition for authigenic cements.
• Carbon isotopic composition of carbonate cements may provide an indication of possible sources of dissolved inorganic carbon.